Study of 57Fe Mossbauer effect in RFe2Zn20 ( R = Lu, Yb, Gd)

Paul C Canfield; Sergey L. Bud'ko; Tai Kong; Xiaoming Ma

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Study of 57Fe Mossbauer effect in RFe2Zn20 ( R = Lu, Yb, Gd)

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arxiv 1506.03802 v1 pith:66GNO7RW submitted 2015-06-11 cond-mat.mtrl-sci

Sergey L. Bud'ko , Tai Kong , Xiaoming Ma , Paul C Canfield This is my paper · ORCID

classification cond-mat.mtrl-sci

keywords temperaturedebyemossbauerrfe2zn20roomspectravaluesanalyzed

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We report measurements of 57Fe Mossbauer spectra for RFe2Zn20 ( R = Lu, Yb, Gd) from ~ 4.5 K to room temperature. The obtained isomer shift values are very similar for all three compounds, their temperature dependence was analyzed within the Debye model and resulted in an estimate of the Debye temperatures of 450-500 K. The values of quadrupole splitting at room temperature change with the cubic lattice constant a in a linear fashion. For GdFe2Zn20, ferromagnetic order is seen as an appearance of a sextet in the spectra. The 57Fe site hyperfine field for T = 0 was evaluated to be ~ 2.4 T.

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